288 A MANUAL OF ANATOMY. 



(usually) by uniting with the articular branch of the su- 

 perior profunda to form an arch above the olecranon fossa. 

 The veins. These are venae comites, accompanying the 

 arteries above and opening into the brachial veins. 



The Nerves. Figs. 63, 64, 65. 



(1) The musculocutaneous nerve. This is the direct 

 continuation of the outer cord of the brachial plexus. It 

 passes through the coracobrachialis muscle, then between 

 the biceps and brachialis anticus ; appearing at the outer 

 border of the tendon of the biceps, it pierces the deep fascia 

 over the elbow and becomes the cutaneous nerve to the 

 outer side of the front of the arm. In its course through 

 the arm the musculocutaneous supplies the coracobrachialis, 

 biceps, and brachialis anticus. 



(2) The median nerve is formed by a branch from the 

 outer and inner cords of the brachial plexus, which unite at 

 the outer side of the axillary artery ; the nerve passes down 

 the arm to reach the inner side of the brachial artery in 

 front of the elbow, having crossed the middle of the artery 

 in front or behind it. 



The median nerve has no branches in the arm, but just 

 above the bend of the elbow it gives off the articular branch 

 to the joint. 



(3) The ulnar nerve continues the inner cord down the 

 inside of the arm, is joined by the inferior profunda artery 

 about its middle, and disappears behind the internal condyle. 

 An articular branch is furnished to the elbow-joint behind 

 the condyle. 



(4) The internal cutaneous. This comes from the inter- 

 nal cord, descends along the inner side of the arm, pierces 

 the deep fascia above the elbow, divides into an anterior 

 and posterior branch. The anterior continues down the 



